JP7133112B1 - Vehicle Signal Light Structure and Daytime Running Light - Google Patents

Abstract

A vehicle signal light structure and daytime running light are provided.
A vehicle signal light structure includes a light guide (20), two light source modules (30) and a collimator (50). The light guide (20) has an elongated light output surface (22), light incident surfaces (21) disposed on either side of the light output surface (22), and disposed below the light output surface (22). and a light guide surface (25). The light guide face (25) slopes upward from the light entrance face (21) to the central portion of the light guide (20). The light guide face (25) has a plurality of V-shaped microstructures (251) that define the light guide structure. The light source module (30) is arranged on the light entrance surface (21) of the light guide (20). The collimator (50) has a light entrance surface (51) arranged at the light output surface (22) of the light guide (20). Light (L1, L2, L4) passing through the light entrance face (21) of the light guide (20) is reflected by the light guide face (25) towards the light output face (22) and then to the collimator (50). is collimated by
[Selection drawing] Fig. 1

Description

VEHICLE SIGNAL LIGHT STRUCTURE TECHNICAL FIELD The present disclosure relates to a vehicular signal light structure that deploys side lights that provide an elongated light pattern.

The elongated vehicular light disclosed in US Pat. No. 5,300,004 has multiple light sources arranged in a line to maintain a specific luminous intensity, ensuring each section of the slender vehicular light to meet different requirements. also means that multiple light sources are required according to the length of the lamp.

In another elongated vehicular light disclosed in U.S. Pat. No. 5,400,003, a sidelight light source is disposed on one side of an elongated light guide, and light is reflected within the light guide towards an elongated light output surface. The benefit of deploying sidelights is to reduce the amount of light sources. However, the light undergoes total internal reflection within the light guide, and light at a particular angle is reflected by the microstructure behind the light guide and directed to the front light output surface, ensuring an elongated light source distribution at each position. Can not do it. Moreover, the farther away from the light source the light is constructed, the less likely it is to reach the light output surface and the brightness decreases accordingly.

TW202024522 CN102818203A

The present disclosure relates to a vehicle signal light structure, which comprises a light guide, at least two light source modules, and a collimator. The light guide has an elongated light output face, light entrance faces disposed at opposite ends of the light output face, and a light guide face disposed below the light output face. The light guide surface slopes upward from the light entrance surface to the central portion of the light guide. The light guide face has a plurality of V-shaped microstructures defining a light guide structure. Light passing through the light entrance face of the light guide is reflected by the light guide face towards the light output face. The two light source modules are individually arranged separately from opposite ends of the light entrance surface of the light guide. The extension direction of the collimator is the same as the extension direction of the light output surface of the light guide. The light entrance surface of the collimator faces the light output surface of the light guide. Light from the light output face of the light guide is collimated by the collimator and then illuminates the outside of the light output face of the collimator.

In some embodiments, vehicle lights deploy side lights to provide sufficient light intensity to meet various requirements, in addition to reducing light intensity.

In some embodiments, the collimators have identical contours in the direction of extension. The longitudinal cross-section of the light guide is two symmetrical wedges.

In some embodiments, a portion of the light emitted by the light source module is reflected at least twice within the light guide. The light entrance face of the light guide comprises a plurality of light source modules, which are spaced at varying distances from the light output face of the light guide to provide sufficient luminous intensity.

In some embodiments, the light guide surface at different positions comprises a plurality of V-shaped microstructures with different distribution densities so as to adjust the light intensity at different positions in the direction of extension (Y direction).

The present disclosure further provides a daytime running light comprising the vehicle signal light structure described above.

1 is a schematic diagram showing a vehicle signal light structure; FIG. It is a partial enlarged view showing a side cross section of the vehicle signal lamp structure. 1 is a schematic diagram showing the internal light path of a light guide of a vehicle signal light structure; FIG. 1 is a schematic diagram showing internal optical paths of a conventional elongated light guide; FIG. FIG. 4B is another schematic diagram showing the internal optical path of the light guide; FIG. 4 is a schematic diagram showing the internal optical path of the collimator; FIG. 4 is a schematic diagram showing the visual effect of the viewing direction of the vehicle signal light structure; 8 is a schematic diagram showing the visual simulation effect of FIG. 7; FIG. FIG. 4 is a schematic diagram showing a simulation of luminous intensity in various directions of a vehicle signal light structure; FIG. 10 is a schematic diagram showing a simulation of the luminous intensity distribution in the horizontal direction of FIG. 9; Fig. 10 is a schematic diagram showing a simulation of the luminous intensity distribution in the vertical direction of Fig. 9;

The following description follows the general understanding of those skilled in the art, and refers to the light output direction of linear vehicle lights as forward. Please refer to FIG. The convex direction of the Z direction is called front, the Y direction is called the extension direction of the linear vehicle light, and the X direction is called the width of the vehicle light.

The present disclosure provides one embodiment of the internal structure of an elongated daytime running light deploying a sidelight (light source module 30), shown in FIG. A sidelight transforms the light source into an elongated linear light source by means of a light guide 20, and the light is focused and collected by a collimator 50 to meet alignment requirements. This light structure also applies to various vehicle lights, such as low beam lights, turn signal lights, position lights, tail lights, brake lights, reversing lights or decorative lights, and is not limited to the above.

See FIGS. 1 and 2. FIG. The present disclosure provides a lamp structure comprising a light guide 20 , at least two light source modules 30 and a collimator 50 . The light guide 20 is provided in an elongated shape to correspond to and provide a linear light pattern. The light guide 20 has a light output surface 22 on its upper side. The light guide 20 has light incident surfaces 21 on its left and right (Y-direction) sides. The light entrance surface 21 is perpendicular to the light output surface 22 .

The light guide 20 has a light guide surface 25 on its underside, which corresponds to the light output surface 22 perpendicular to the plane of the light output direction. The light guide surface 25 is an oblique surface, which on the one hand joins the profile below the light entrance surface 21 and on the other hand extends above the central portion of the light guide 20 , the long cross-section of the light guide 20 . into two symmetrical wedges, the tips of the wedges are in contact with each other.
The light guide surface 25 comprises a plurality of V-shaped microstructures 251 intersecting the sloping surfaces to define a light guide structure. The tips of the V-shaped microstructures 251 face upwards, and the front and rear sides (X direction) of the light guide 20 are attached to the side plates 23 so as to prevent lateral light leakage.

The light source modules 30 are individually disposed away from the ends of the light entrance surface 21 of the light guide 20 , the light output surface 22 of the light source module is directly attached to the light entrance surface 21 , and the light source directly faces the light guide 20 . allow to pass through. It is worth mentioning that the cross section of the light guide is trapezoidal and each light entrance surface 21 of the light guide 20 comprises a plurality of LED chips 301,302,303. The plurality of LED chips 301, 302, 303 are spaced apart from the light output face 22 of the light guide at different distances, ie different distances in the Z direction, to provide sufficient light source.

See FIG. Light passing through the light input surface 21 of the light guide 20 is reflected by the light guide surface 25 and directed toward the light output surface 22, with light L1 closer to the light input surface 21 as well as closer to the central portion of the light guide 20. Light L2 is also reflected by V-shaped microstructures 251 toward light output surface 22 . It is arbitrary whether the tip of the V-shaped microstructure 251 faces upward or downward, provided that it can be reflected by the V-shaped microstructure 251 .

See FIGS. 3-5. Uniformly shaped elongated light guides 40 and sidelights (light source modules 30) are deployed as shown in FIG. The LED is a point light source, the light L3 passes through the light guide 40 on the side of the light entrance surface due to the law of refraction (Snell's law), and the light continues to undergo total internal reflection within the light guide 40. , emits light to the opposite side 42 and does not emit light in the Z direction.
When the light guide 20 of the present disclosure is deployed as shown in FIG. 5, the wedge structure of the light guide 20 (in the ZY cross section) causes the light L4 to touch the inclined surface at the bottom multiple times, gradually changing the angle of reflection. or the light L4 can emit light in the Z direction, or the light L4 has a better chance to be reflected by the V-shaped microstructures 251, or a better chance to pass through the light output surface 22. have The closer the light guide 20 is to the left in FIG. 5, the more likely it is that light will be emitted in the Z direction. The LED chips 301 , 302 , 303 located at different positions in the Z direction can reflect light through the wedge structure and emit light to the light output surface 22 .

Under the above premise, the higher the density of the V-shaped microstructures, the more the light source in the corresponding area is reflected. Therefore, adjusting the amount of microstructure allows adjustment of the brightness of the light at different locations.

See FIGS. 1, 2 and 6. FIG. Collimator 50 is also an elongated light guide. The extending direction of the collimator 50 is the same as the extending direction of the light guide 20 . The collimator 50 has the same profile in the extension direction, ie the cross-sectional shape of the collimator 50 at various positions in the Y direction is the same. The light output surface 52 of collimator 50 is a flat surface or an arcuate surface. The light entrance surface 51 of the collimator 50 faces the linear light pattern of the light output surface 22 of the light guide 20 . Light from the light output surface 22 of the light guide 20 is collimated by the collimator 50 and then illuminates the outside of the light output surface 52 of the collimator 50 .

Please refer to FIG. 7 which shows the visual effect of the viewing direction of the vehicle signal light structure. The observer's eyes are directly in front of the light output surface 52 of the lamp structure, and the observer's eyes are perpendicular to the light output surface. The upper part of FIG. 7 expands the tip of the cone to simulate the position of the observer's eye, the cone containing the range that acts as a simulation range for the brightness observed by the observer's eye, and the cone's The bottom frame shows the simulated area that the observer's eyes observe. The result is shown in Figure 8, where the visual effect of the observer's eye is a uniform elongated light pattern.

See FIG. 9, which shows a cross-sectional view of the simulated luminosity direction pointing in the Z direction. The opening angle in the X direction is ±45 degrees, and the opening angle in the Y direction is ±30 degrees. 10 and 11 show the horizontal (Y-direction) and vertical (X-direction) luminous intensity distributions of FIG. 9 simulating the luminous intensity (in cd). The daytime running lights of the present disclosure have a luminous intensity of about 700 cd at center, a luminous intensity of at least 500 cd at horizontal and vertical opening angles within ±10 degrees, and at least 500 cd at horizontal angles within ±15 degrees. have luminosity. The luminous intensity, or range covered by the light, is approximately ±45 degrees in the X direction and ±30 degrees in the Y direction.
As indicated above, the luminosity in the center is more intense. This is because the light passes through the light guide and the V-shaped structure, which directs the light from the Y-direction to the Z-direction, and the collimator focuses the light in the X-direction. The two optical elements are deployed to suit various light conditioning requirements.

20 light guide 21 light entrance surface 22 light output surface 25 light guide surface 30 light source module 50 collimator 251 V-shaped microstructure 301 light source module 302 light source module 303 light source module

Claims (8)

A vehicle signal light structure,
an elongated light output surface (22), a light entrance surface (21) disposed at each end of said light output surface (22), and a light guide surface (25) disposed below said light output surface (22). a light guide (20) comprising
at least two light source modules (30) arranged separately from opposite ends of the light entrance surface (21) of the light guide (20);
a collimator (50);
the light guide surface (25) slopes upward from one side of the light entrance surface (21) to a central portion of the light guide (20);
said light guide surface (25) having a plurality of V-shaped microstructures (251) defining a light guide structure;
Light (L1, L2, L4) passing through the light entrance face (21) of the light guide (20) is reflected by the light guide face (25) and then towards the light output face (22). opposite,
the extending direction of the collimator (50) is the same as the extending direction of the light output surface (22) of the light guide (20),
said light entrance surface (51) of said collimator (50) faces said light output surface (22) of said light guide (20),
Light from the light output surface (22) of the light guide (20) is collimated by the collimator (50) and then illuminates the outside of the light output surface (52) of the collimator (50). characterized by
Vehicle signal light structure. The vehicle signal light structure according to claim 1, characterized in that said collimator (50) has the same outer shape in the direction of extension. Vehicle signal light structure according to claim 1 or 2, characterized in that the longitudinal section of the light guide (20) is two symmetrical wedges. Vehicle according to any one of claims 1 to 3, characterized in that the light (L1, L2, L4) from the light source module (30) passes directly through the light entrance surface (21). Signal light structure. 5. Any of claims 1 to 4, characterized in that part of the light (L1, L2, L4) emitted by the light source module (30) is reflected at least twice within the light guide (20). 1. Vehicle signal light structure according to claim 1. The light incident surface (21) of the light guide (20) has a plurality of light source modules (301, 302, 303), and the plurality of light source modules (301, 302, 303) are connected to the light guide (20). 6. A vehicular signal light arrangement according to any one of claims 1 to 5, characterized in that it is spaced at varying distances from said light output surface (22) of ). 7. Vehicle according to any one of the preceding claims, characterized in that the light guide surface (25) has a plurality of V-shaped microstructures (251) with different distribution densities at different locations. Signal light structure. A vehicle signal light structure according to any one of claims 1 to 7,
Daytime running lights.

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